14.1.5 Generic test procedure for radio bearers on MTCH

34.123-13GPPPart 1: Protocol conformance specificationRelease 15TSUser Equipment (UE) conformance specification

Initial conditions

System Simulator: 1 MBMS cell

The UE is in CELL_FACH state as specified in clause 7.6 of TS 34.108.

The UE has selected the broadcast service or joined the multicast service to be provided by the SS (included in MBMS_ACTIVATED_SERVICES variable).

Test procedure

a) The UE is in the CELL_FACH state. The SS notifies on MICH and MCCH about the start of an MBMS session and waits for the UE to activate MTCH reception.

b) The SS closes the test loop using UE test loop mode 3.

c) The SS broadcast 10 RLC SDUs on the MTCH configured on the concerned MBMS radio bearer. The MBMS data is broadcasted using RLC SDU size and transport format as specified for sub-test 1.

d) The SS retrieves the number of RLC SDUs on MTCH counted by the UE by sending the UE TEST LOOP MODE 3 RLC SDU COUNTER REQUEST message. The SS checks that the UE has received at least one RLC SDU and records the reported value.

e) Repeat steps f) and g) for the remaining sub-tests.

f) The SS broadcast 10 RLC SDUs on the MTCH configured on the concerned MBMS radio bearer. The MBMS data is broadcasted using RLC SDU size and transport format as specified for the sub-test under test.

g) The SS retrieves the number of RLC SDUs on MTCH counted by the UE by sending the UE TEST LOOP MODE 3 RLC SDU COUNTER REQUEST message. The SS checks that the UE has received at least one RLC SDU of the MBMS data sent in step f). The SS records the reported value. See note 1.

h) The SS deactivates the UE test loop mode 3.

NOTE 1: For UE in UE test loop mode 3 then the RLC SDU counter value is only reset upon reception of CLOSE UE TEST LOOP message configuring UE test loop mode 3. To enable the SS to measure the number of received RLC SDUs for the different sub-tests then the SS needs to record the reported values for each sub-test and make the checking of the reported value relative to the previously reported value.

Expected sequence

Step	Direction		Message	Comment
	UE	SS
1			ACTIVATE RB TEST MODE
2			ACTIVATE RB TEST MODE COMPLETE
3			MBMS MODIFIED SERVICES INFORMATION	MBMS session start. The SS also sets the Notification Indicator on MICH. The SS waits for the UE to establish the MTCH according to the activation time.
4			CLOSE UE TEST LOOP
5			CLOSE UE TEST LOOP COMPLETE	Loop back mode 3 on MTCH is activated.
6	SS			The SS transmits 10 RLC SDUs on the MTCH. The MBMS data is broadcasted using RLC SDU size and transport format as specified for sub-test 1.
7			UE TEST LOOP MODE 3 RLC SDU COUNTER REQUEST
8			UE TEST LOOP MODE 3 RLC SDU COUNTER RESPONSE	The SS checks that the number of reported RLC PDUs is greater than zero and records the value.
9	SS			The SS repeats steps 10 to 12 for the remaining sub-tests (sub-test 2 etc.).
10	SS			The SS transmits 10 RLC SDUs on the MTCH. The MBMS data is broadcasted using RLC SDU size and transport format as specified for the current sub-test under test.
11			UE TEST LOOP MODE 3 RLC SDU COUNTER REQUEST
12			UE TEST LOOP MODE 3 RLC SDU COUNTER RESPONSE	The SS checks that the number of reported RLC PDUs is greater than the recorded value from the previous sub-test. The SS records the reported value.
13			OPEN UE TEST LOOP
14			OPEN UE TEST LOOP COMPLETE
15			DEACTIVATE RB TEST MODE
16			DEACTIVATE RB TEST MODE COMPLETE

Specific Message Contents

MBMS MODIFIED SERVICES INFORMATION (Step 3)

Information Element	Value/remark
Message type
Modified service list
– MBMS Transmission identity
– MBMS Service ID	1
– MBMS Session ID	1
– MBMS required UE action	Acquire PTM RB info
MBMS p-t-m activation time	SS shall choose a value which is sufficient far ahead for the UE to establish the MTCH

UE TEST LOOP MODE 3 RLC SDU COUNTER RESPONSE (Steps 8)

Information Element	Value/remark
RLC SDU Counter Value	Check that the number is greater than zero

UE TEST LOOP MODE 3 RLC SDU COUNTER RESPONSE (Steps 12)

Information Element	Value/remark
RLC SDU Counter Value	Check that the number is greater than the value reported at the previous sub-test.